/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c


--------------------------------------------------------------------------------


This is Ultimate 0.2.3-dev-f954360
[2023-03-31 00:21:36,266 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2023-03-31 00:21:36,268 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2023-03-31 00:21:36,332 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
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[2023-03-31 00:21:36,336 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2023-03-31 00:21:36,339 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2023-03-31 00:21:36,340 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2023-03-31 00:21:36,363 INFO  L113        SettingsManager]: Loading preferences was successful
[2023-03-31 00:21:36,363 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2023-03-31 00:21:36,364 INFO  L136        SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2023-03-31 00:21:36,364 INFO  L138        SettingsManager]:  * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2023-03-31 00:21:36,367 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2023-03-31 00:21:36,367 INFO  L138        SettingsManager]:  * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2023-03-31 00:21:36,367 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2023-03-31 00:21:36,367 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2023-03-31 00:21:36,367 INFO  L138        SettingsManager]:  * Use SBE=true
[2023-03-31 00:21:36,368 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2023-03-31 00:21:36,368 INFO  L138        SettingsManager]:  * sizeof long=4
[2023-03-31 00:21:36,368 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2023-03-31 00:21:36,368 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2023-03-31 00:21:36,368 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2023-03-31 00:21:36,368 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2023-03-31 00:21:36,368 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2023-03-31 00:21:36,368 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2023-03-31 00:21:36,368 INFO  L138        SettingsManager]:  * sizeof long double=12
[2023-03-31 00:21:36,369 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2023-03-31 00:21:36,369 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2023-03-31 00:21:36,369 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2023-03-31 00:21:36,369 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2023-03-31 00:21:36,369 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2023-03-31 00:21:36,369 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2023-03-31 00:21:36,369 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 00:21:36,369 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2023-03-31 00:21:36,370 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2023-03-31 00:21:36,370 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2023-03-31 00:21:36,370 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2023-03-31 00:21:36,370 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2023-03-31 00:21:36,370 INFO  L138        SettingsManager]:  * Automaton type used in concurrency analysis=PETRI_NET
[2023-03-31 00:21:36,370 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2023-03-31 00:21:36,370 INFO  L138        SettingsManager]:  * Order on configurations for Petri net unfoldings=DBO
[2023-03-31 00:21:36,370 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2023-03-31 00:21:36,371 INFO  L138        SettingsManager]:  * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC
[2023-03-31 00:21:36,371 INFO  L138        SettingsManager]:  * Looper check in Petri net analysis=SEMANTIC
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2023-03-31 00:21:36,611 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2023-03-31 00:21:36,632 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2023-03-31 00:21:36,634 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2023-03-31 00:21:36,635 INFO  L271        PluginConnector]: Initializing CDTParser...
[2023-03-31 00:21:36,635 INFO  L275        PluginConnector]: CDTParser initialized
[2023-03-31 00:21:36,636 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c
[2023-03-31 00:21:37,797 INFO  L500              CDTParser]: Created temporary CDT project at NULL
[2023-03-31 00:21:38,076 INFO  L351              CDTParser]: Found 1 translation units.
[2023-03-31 00:21:38,076 INFO  L172              CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c
[2023-03-31 00:21:38,086 INFO  L394              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f93c1258/e77b1075a18947949942f6c5a4733f51/FLAG8dce9e019
[2023-03-31 00:21:38,105 INFO  L402              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f93c1258/e77b1075a18947949942f6c5a4733f51
[2023-03-31 00:21:38,107 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2023-03-31 00:21:38,108 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2023-03-31 00:21:38,109 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2023-03-31 00:21:38,109 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2023-03-31 00:21:38,113 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2023-03-31 00:21:38,113 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,114 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4323bccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38, skipping insertion in model container
[2023-03-31 00:21:38,115 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,120 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2023-03-31 00:21:38,166 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2023-03-31 00:21:38,406 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529]
[2023-03-31 00:21:38,418 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 00:21:38,432 INFO  L203         MainTranslator]: Completed pre-run
[2023-03-31 00:21:38,502 WARN  L247   ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529]
[2023-03-31 00:21:38,509 INFO  L209          PostProcessor]: Analyzing one entry point: main
[2023-03-31 00:21:38,516 WARN  L667               CHandler]: The function fopen is called, but not defined or handled by StandardFunctionHandler.
[2023-03-31 00:21:38,522 INFO  L208         MainTranslator]: Completed translation
[2023-03-31 00:21:38,523 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38 WrapperNode
[2023-03-31 00:21:38,523 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2023-03-31 00:21:38,524 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2023-03-31 00:21:38,524 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2023-03-31 00:21:38,524 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2023-03-31 00:21:38,535 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,535 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,553 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,554 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,596 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,600 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,603 INFO  L185        PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,618 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,623 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2023-03-31 00:21:38,624 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2023-03-31 00:21:38,624 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2023-03-31 00:21:38,624 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2023-03-31 00:21:38,625 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (1/1) ...
[2023-03-31 00:21:38,632 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2023-03-31 00:21:38,643 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 00:21:38,659 INFO  L229       MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2023-03-31 00:21:38,690 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2023-03-31 00:21:38,706 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2023-03-31 00:21:38,708 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2023-03-31 00:21:38,709 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2023-03-31 00:21:38,709 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2023-03-31 00:21:38,709 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2023-03-31 00:21:38,709 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2023-03-31 00:21:38,709 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2023-03-31 00:21:38,709 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2023-03-31 00:21:38,709 INFO  L130     BoogieDeclarations]: Found specification of procedure Id_MCDC_89
[2023-03-31 00:21:38,709 INFO  L130     BoogieDeclarations]: Found specification of procedure fopen
[2023-03-31 00:21:38,709 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2023-03-31 00:21:38,710 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2023-03-31 00:21:38,853 INFO  L236             CfgBuilder]: Building ICFG
[2023-03-31 00:21:38,855 INFO  L262             CfgBuilder]: Building CFG for each procedure with an implementation
[2023-03-31 00:21:39,559 INFO  L277             CfgBuilder]: Performing block encoding
[2023-03-31 00:21:39,565 INFO  L297             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2023-03-31 00:21:39,565 INFO  L302             CfgBuilder]: Removed 0 assume(true) statements.
[2023-03-31 00:21:39,567 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:21:39 BoogieIcfgContainer
[2023-03-31 00:21:39,567 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2023-03-31 00:21:39,569 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2023-03-31 00:21:39,569 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2023-03-31 00:21:39,571 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2023-03-31 00:21:39,571 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:21:38" (1/3) ...
[2023-03-31 00:21:39,572 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0cff16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:21:39, skipping insertion in model container
[2023-03-31 00:21:39,572 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:21:38" (2/3) ...
[2023-03-31 00:21:39,572 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0cff16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:21:39, skipping insertion in model container
[2023-03-31 00:21:39,572 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:21:39" (3/3) ...
[2023-03-31 00:21:39,573 INFO  L112   eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c
[2023-03-31 00:21:39,587 INFO  L203   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2023-03-31 00:21:39,588 INFO  L162   ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2023-03-31 00:21:39,627 INFO  L356      AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2023-03-31 00:21:39,633 INFO  L357      AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2ac29f7b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=<UNSUPPORTED>, UseSemiCommutativity=<UNSUPPORTED>, Solver=<NOT_USED>, SolverTimeout=<NOT_USED>]
[2023-03-31 00:21:39,633 INFO  L358      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2023-03-31 00:21:39,638 INFO  L276                IsEmpty]: Start isEmpty. Operand  has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)
[2023-03-31 00:21:39,647 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 49
[2023-03-31 00:21:39,647 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:21:39,648 INFO  L195           NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:21:39,649 INFO  L420      AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:21:39,654 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:21:39,654 INFO  L85        PathProgramCache]: Analyzing trace with hash -1054632774, now seen corresponding path program 1 times
[2023-03-31 00:21:39,660 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:21:39,661 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284692771]
[2023-03-31 00:21:39,661 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:21:39,661 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:21:39,947 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:21:41,192 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:21:41,195 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:21:41,200 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:21:41,201 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:21:41,201 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284692771]
[2023-03-31 00:21:41,202 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284692771] provided 1 perfect and 0 imperfect interpolant sequences
[2023-03-31 00:21:41,202 INFO  L185   FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2023-03-31 00:21:41,202 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18
[2023-03-31 00:21:41,203 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889196443]
[2023-03-31 00:21:41,204 INFO  L85    oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2023-03-31 00:21:41,207 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2023-03-31 00:21:41,208 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-31 00:21:41,246 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2023-03-31 00:21:41,249 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306
[2023-03-31 00:21:41,251 INFO  L87              Difference]: Start difference. First operand  has 55 states, 49 states have (on average 1.8775510204081634) internal successors, (92), 50 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand  has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 00:21:42,008 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 00:21:42,008 INFO  L93              Difference]: Finished difference Result 92 states and 136 transitions.
[2023-03-31 00:21:42,009 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2023-03-31 00:21:42,011 INFO  L78                 Accepts]: Start accepts. Automaton has  has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48
[2023-03-31 00:21:42,011 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 00:21:42,017 INFO  L225             Difference]: With dead ends: 92
[2023-03-31 00:21:42,017 INFO  L226             Difference]: Without dead ends: 57
[2023-03-31 00:21:42,020 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600
[2023-03-31 00:21:42,023 INFO  L413           NwaCegarLoop]: 60 mSDtfsCounter, 107 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time
[2023-03-31 00:21:42,024 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 714 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time]
[2023-03-31 00:21:42,038 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2023-03-31 00:21:42,052 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54.
[2023-03-31 00:21:42,053 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 00:21:42,054 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions.
[2023-03-31 00:21:42,055 INFO  L78                 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48
[2023-03-31 00:21:42,056 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 00:21:42,056 INFO  L495      AbstractCegarLoop]: Abstraction has 54 states and 54 transitions.
[2023-03-31 00:21:42,056 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 00:21:42,057 INFO  L276                IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions.
[2023-03-31 00:21:42,058 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2023-03-31 00:21:42,058 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:21:42,058 INFO  L195           NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:21:42,058 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2023-03-31 00:21:42,058 INFO  L420      AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:21:42,059 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:21:42,059 INFO  L85        PathProgramCache]: Analyzing trace with hash 1470519801, now seen corresponding path program 1 times
[2023-03-31 00:21:42,059 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:21:42,059 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383149700]
[2023-03-31 00:21:42,060 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:21:42,060 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:21:42,114 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:21:42,934 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:21:42,936 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:21:42,940 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:21:42,940 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:21:42,940 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383149700]
[2023-03-31 00:21:42,940 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383149700] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 00:21:42,941 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12031180]
[2023-03-31 00:21:42,941 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:21:42,941 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 00:21:42,941 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 00:21:42,949 INFO  L229       MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 00:21:42,956 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2023-03-31 00:21:43,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:21:43,242 INFO  L262         TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 25 conjunts are in the unsatisfiable core
[2023-03-31 00:21:43,248 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 00:21:43,478 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:21:43,478 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 00:21:43,916 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:21:43,916 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [12031180] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 00:21:43,917 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-03-31 00:21:43,917 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32
[2023-03-31 00:21:43,917 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213869088]
[2023-03-31 00:21:43,918 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-03-31 00:21:43,918 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 32 states
[2023-03-31 00:21:43,919 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-31 00:21:43,920 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants.
[2023-03-31 00:21:43,920 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992
[2023-03-31 00:21:43,920 INFO  L87              Difference]: Start difference. First operand 54 states and 54 transitions. Second operand  has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 00:21:48,873 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 00:21:48,873 INFO  L93              Difference]: Finished difference Result 119 states and 130 transitions.
[2023-03-31 00:21:48,873 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2023-03-31 00:21:48,874 INFO  L78                 Accepts]: Start accepts. Automaton has  has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53
[2023-03-31 00:21:48,874 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 00:21:48,875 INFO  L225             Difference]: With dead ends: 119
[2023-03-31 00:21:48,875 INFO  L226             Difference]: Without dead ends: 116
[2023-03-31 00:21:48,876 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=690, Invalid=2066, Unknown=0, NotChecked=0, Total=2756
[2023-03-31 00:21:48,877 INFO  L413           NwaCegarLoop]: 19 mSDtfsCounter, 324 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time
[2023-03-31 00:21:48,878 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 279 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]
[2023-03-31 00:21:48,879 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 116 states.
[2023-03-31 00:21:48,889 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114.
[2023-03-31 00:21:48,890 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 114 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 00:21:48,891 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions.
[2023-03-31 00:21:48,891 INFO  L78                 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 53
[2023-03-31 00:21:48,892 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 00:21:48,892 INFO  L495      AbstractCegarLoop]: Abstraction has 114 states and 114 transitions.
[2023-03-31 00:21:48,892 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 32 states, 32 states have (on average 3.59375) internal successors, (115), 31 states have internal predecessors, (115), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 00:21:48,892 INFO  L276                IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions.
[2023-03-31 00:21:48,895 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 114
[2023-03-31 00:21:48,895 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:21:48,895 INFO  L195           NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:21:48,909 INFO  L552       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2023-03-31 00:21:49,102 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 00:21:49,103 INFO  L420      AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:21:49,103 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:21:49,103 INFO  L85        PathProgramCache]: Analyzing trace with hash -1546768967, now seen corresponding path program 2 times
[2023-03-31 00:21:49,104 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:21:49,104 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653638650]
[2023-03-31 00:21:49,104 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:21:49,104 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:21:49,187 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:21:50,801 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:21:50,803 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:21:50,819 INFO  L134       CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:21:50,819 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:21:50,819 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653638650]
[2023-03-31 00:21:50,820 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653638650] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 00:21:50,820 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971672439]
[2023-03-31 00:21:50,820 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2023-03-31 00:21:50,820 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 00:21:50,820 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 00:21:50,825 INFO  L229       MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 00:21:50,850 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2023-03-31 00:21:51,224 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2023-03-31 00:21:51,224 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-03-31 00:21:51,231 INFO  L262         TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 49 conjunts are in the unsatisfiable core
[2023-03-31 00:21:51,237 INFO  L285         TraceCheckSpWp]: Computing forward predicates...
[2023-03-31 00:21:51,529 INFO  L134       CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:21:51,529 INFO  L327         TraceCheckSpWp]: Computing backward predicates...
[2023-03-31 00:21:52,852 INFO  L134       CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:21:52,853 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleZ3 [971672439] provided 0 perfect and 2 imperfect interpolant sequences
[2023-03-31 00:21:52,853 INFO  L185   FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2023-03-31 00:21:52,853 INFO  L198   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 56
[2023-03-31 00:21:52,853 INFO  L121   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169252328]
[2023-03-31 00:21:52,853 INFO  L85    oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2023-03-31 00:21:52,854 INFO  L571      AbstractCegarLoop]: INTERPOLANT automaton has 56 states
[2023-03-31 00:21:52,854 INFO  L100   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2023-03-31 00:21:52,855 INFO  L143   InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants.
[2023-03-31 00:21:52,857 INFO  L145   InterpolantAutomaton]: CoverageRelationStatistics Valid=739, Invalid=2341, Unknown=0, NotChecked=0, Total=3080
[2023-03-31 00:21:52,857 INFO  L87              Difference]: Start difference. First operand 114 states and 114 transitions. Second operand  has 56 states, 56 states have (on average 4.196428571428571) internal successors, (235), 55 states have internal predecessors, (235), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 00:22:35,099 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2023-03-31 00:22:35,099 INFO  L93              Difference]: Finished difference Result 219 states and 238 transitions.
[2023-03-31 00:22:35,099 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. 
[2023-03-31 00:22:35,100 INFO  L78                 Accepts]: Start accepts. Automaton has  has 56 states, 56 states have (on average 4.196428571428571) internal successors, (235), 55 states have internal predecessors, (235), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113
[2023-03-31 00:22:35,100 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2023-03-31 00:22:35,101 INFO  L225             Difference]: With dead ends: 219
[2023-03-31 00:22:35,101 INFO  L226             Difference]: Without dead ends: 216
[2023-03-31 00:22:35,104 INFO  L412           NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=2215, Invalid=7097, Unknown=0, NotChecked=0, Total=9312
[2023-03-31 00:22:35,105 INFO  L413           NwaCegarLoop]: 31 mSDtfsCounter, 346 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 2084 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time
[2023-03-31 00:22:35,106 INFO  L414           NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 745 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2084 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time]
[2023-03-31 00:22:35,107 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 216 states.
[2023-03-31 00:22:35,122 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214.
[2023-03-31 00:22:35,122 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand  has 214 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 states have internal predecessors, (211), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 00:22:35,124 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 214 transitions.
[2023-03-31 00:22:35,124 INFO  L78                 Accepts]: Start accepts. Automaton has 214 states and 214 transitions. Word has length 113
[2023-03-31 00:22:35,125 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2023-03-31 00:22:35,125 INFO  L495      AbstractCegarLoop]: Abstraction has 214 states and 214 transitions.
[2023-03-31 00:22:35,125 INFO  L496      AbstractCegarLoop]: INTERPOLANT automaton has  has 56 states, 56 states have (on average 4.196428571428571) internal successors, (235), 55 states have internal predecessors, (235), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)
[2023-03-31 00:22:35,125 INFO  L276                IsEmpty]: Start isEmpty. Operand 214 states and 214 transitions.
[2023-03-31 00:22:35,131 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 214
[2023-03-31 00:22:35,131 INFO  L187           NwaCegarLoop]: Found error trace
[2023-03-31 00:22:35,131 INFO  L195           NwaCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2023-03-31 00:22:35,139 INFO  L540       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0
[2023-03-31 00:22:35,339 WARN  L477      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2023-03-31 00:22:35,339 INFO  L420      AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2023-03-31 00:22:35,340 INFO  L145       PredicateUnifier]: Initialized classic predicate unifier
[2023-03-31 00:22:35,340 INFO  L85        PathProgramCache]: Analyzing trace with hash -331389959, now seen corresponding path program 3 times
[2023-03-31 00:22:35,340 INFO  L118   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2023-03-31 00:22:35,340 INFO  L334   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248813174]
[2023-03-31 00:22:35,340 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2023-03-31 00:22:35,340 INFO  L127          SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2023-03-31 00:22:36,265 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:41,346 INFO  L376   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2023-03-31 00:22:41,348 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2023-03-31 00:22:41,354 INFO  L134       CoverageAnalysis]: Checked inductivity of 2739 backedges. 99 proven. 2640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2023-03-31 00:22:41,354 INFO  L136   FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2023-03-31 00:22:41,354 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248813174]
[2023-03-31 00:22:41,354 INFO  L158   FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248813174] provided 0 perfect and 1 imperfect interpolant sequences
[2023-03-31 00:22:41,354 INFO  L334   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325642016]
[2023-03-31 00:22:41,355 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2023-03-31 00:22:41,355 INFO  L173          SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2023-03-31 00:22:41,355 INFO  L189       MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
[2023-03-31 00:22:41,357 INFO  L229       MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2023-03-31 00:22:41,363 INFO  L327       MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2023-03-31 00:22:41,884 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2023-03-31 00:22:41,884 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2023-03-31 00:22:41,889 INFO  L262         TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 30 conjunts are in the unsatisfiable core
[2023-03-31 00:22:41,897 INFO  L285         TraceCheckSpWp]: Computing forward predicates...